When I use Cmake to compile the file, it shows /usr/bin/ld: cannot find -ltest. However when I use g++ to compile the file, it is ok

Question

This is the CMakeList.txt in src directory:

ADD_EXECUTABLE(Expression ExpressionValue.cpp) INCLUDE_DIRECTORIES(/root/fengwu/codes/headfiles/expressi

Answer 1

From the documentation for link_directories:

The command will apply only to targets created after it is called.

For make link_directories() call work you need to move it before add_executable().